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Very few fossil of jelly fish or their close relatives have been found. This makes it hard to trace the evolutionary history of jellyfish using fossil record. what explain this
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Very few fossil of jelly fish or their close relatives have been found. This makes it hard to trace the evolutionary history of jellyfish using fossil record. what explain this

User XAMT
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2 Answers

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jellyfish dont have bones. fossils formed from bones or rock formation.
User Neha Bhardwaj
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This statement explains that jelly fish in an endemic species 
User Patze
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